[INFO] cloning repository https://github.com/JohnBish/mandelbrot.rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/JohnBish/mandelbrot.rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJohnBish%2Fmandelbrot.rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJohnBish%2Fmandelbrot.rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a8a2a4382ba32b389d48ccc68b953ef8aed94b81
[INFO] checking JohnBish/mandelbrot.rs against beta for pr-78714
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJohnBish%2Fmandelbrot.rs" "/workspace/builds/worker-9/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-9/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/JohnBish/mandelbrot.rs on toolchain beta
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/JohnBish/mandelbrot.rs
[INFO] finished tweaking git repo https://github.com/JohnBish/mandelbrot.rs
[INFO] tweaked toml for git repo https://github.com/JohnBish/mandelbrot.rs written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate git repo https://github.com/JohnBish/mandelbrot.rs already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded serde_derive v1.0.99
[INFO] [stderr]   Downloaded image v0.22.1
[INFO] [stderr]   Downloaded png v0.15.0
[INFO] [stderr]   Downloaded rayon-core v1.6.0
[INFO] [stderr]   Downloaded piston2d-opengl_graphics v0.68.0
[INFO] [stderr]   Downloaded x11-dl v2.18.4
[INFO] [stderr]   Downloaded piston2d-graphics v0.35.0
[INFO] [stderr]   Downloaded rayon v1.2.0
[INFO] [stderr]   Downloaded piston-gfx_texture v0.38.0
[INFO] [stderr]   Downloaded piston-texture v0.7.0
[INFO] [stderr]   Downloaded derivative v1.0.3
[INFO] [stderr]   Downloaded backtrace v0.3.37
[INFO] [stderr]   Downloaded backtrace-sys v0.1.31
[INFO] [stderr]   Downloaded piston2d-gfx_graphics v0.64.0
[INFO] [stderr]   Downloaded piston_window v0.103.0
[INFO] [stderr]   Downloaded autocfg v0.1.6
[INFO] [stderr]   Downloaded cc v1.0.41
[INFO] [stderr]   Downloaded proc-macro2 v1.0.2
[INFO] [stderr]   Downloaded glutin v0.21.1
[INFO] [stderr]   Downloaded jpeg-decoder v0.1.16
[INFO] [stderr]   Downloaded piston2d-graphics v0.34.0
[INFO] [stderr]   Downloaded pkg-config v0.3.15
[INFO] [stderr]   Downloaded winit v0.19.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 16a7114eea28f2f1a472b064b86b8357ab98a9e1c592fd4057cbf033f8968c87
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "16a7114eea28f2f1a472b064b86b8357ab98a9e1c592fd4057cbf033f8968c87", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "16a7114eea28f2f1a472b064b86b8357ab98a9e1c592fd4057cbf033f8968c87", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "16a7114eea28f2f1a472b064b86b8357ab98a9e1c592fd4057cbf033f8968c87", kill_on_drop: false }`
[INFO] [stdout] 16a7114eea28f2f1a472b064b86b8357ab98a9e1c592fd4057cbf033f8968c87
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] e59d9f25a61715e831a4b32913588bd1c73308ea46c2b2c3ec6bd9cb314a0b7c
[INFO] running `Command { std: "docker" "start" "-a" "e59d9f25a61715e831a4b32913588bd1c73308ea46c2b2c3ec6bd9cb314a0b7c", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.2
[INFO] [stderr]    Compiling pkg-config v0.3.15
[INFO] [stderr]    Compiling serde v1.0.99
[INFO] [stderr]     Checking downcast-rs v1.0.4
[INFO] [stderr]     Checking piston-texture v0.7.0
[INFO] [stderr]     Checking gif v0.10.2
[INFO] [stderr]    Compiling gl_generator v0.11.0
[INFO] [stderr]    Compiling gl_generator v0.10.0
[INFO] [stderr]     Checking stb_truetype v0.2.6
[INFO] [stderr]    Compiling xml-rs v0.7.0
[INFO] [stderr]     Checking libloading v0.5.2
[INFO] [stderr]     Checking draw_state v0.8.0
[INFO] [stderr]     Checking piston2d-graphics v0.35.0
[INFO] [stderr]     Checking ordered-float v1.0.2
[INFO] [stderr]     Checking png v0.15.0
[INFO] [stderr]     Checking rayon v1.2.0
[INFO] [stderr]     Checking dlib v0.4.1
[INFO] [stderr]     Checking rusttype v0.7.7
[INFO] [stderr]     Checking wayland-sys v0.21.13
[INFO] [stderr]     Checking gfx_core v0.8.3
[INFO] [stderr]     Checking wayland-commons v0.21.13
[INFO] [stderr]    Compiling x11-dl v2.18.4
[INFO] [stderr]     Checking andrew v0.2.1
[INFO] [stderr]     Checking piston2d-graphics v0.34.0
[INFO] [stderr]    Compiling gl_generator v0.9.0
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]     Checking wayland-client v0.21.13
[INFO] [stderr]    Compiling gl v0.11.0
[INFO] [stderr]    Compiling glutin_glx_sys v0.1.5
[INFO] [stderr]    Compiling glutin_egl_sys v0.1.3
[INFO] [stderr]    Compiling syn v1.0.5
[INFO] [stderr]    Compiling gfx_gl v0.5.0
[INFO] [stderr]     Checking wayland-protocols v0.21.13
[INFO] [stderr]     Checking jpeg-decoder v0.1.16
[INFO] [stderr]     Checking image v0.22.1
[INFO] [stderr]     Checking gfx v0.17.1
[INFO] [stderr]     Checking smithay-client-toolkit v0.4.6
[INFO] [stderr]    Compiling serde_derive v1.0.99
[INFO] [stderr]     Checking piston-gfx_texture v0.38.0
[INFO] [stderr]     Checking winit v0.19.3
[INFO] [stderr]     Checking piston2d-gfx_graphics v0.64.0
[INFO] [stderr]     Checking piston2d-opengl_graphics v0.68.0
[INFO] [stderr]     Checking gfx_device_gl v0.15.5
[INFO] [stderr]     Checking glutin v0.21.1
[INFO] [stderr]     Checking pistoncore-input v0.28.0
[INFO] [stderr]     Checking pistoncore-window v0.44.0
[INFO] [stderr]     Checking pistoncore-event_loop v0.49.0
[INFO] [stderr]     Checking pistoncore-glutin_window v0.63.0
[INFO] [stderr]     Checking piston v0.49.0
[INFO] [stderr]     Checking piston_window v0.103.0
[INFO] [stderr]     Checking mandelbrot v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: value assigned to `x` is never read
[INFO] [stdout]   --> src/main.rs:29:17
[INFO] [stdout]    |
[INFO] [stdout] 29 |             let mut x = 0.;
[INFO] [stdout]    |                 ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `y` is never read
[INFO] [stdout]   --> src/main.rs:30:17
[INFO] [stdout]    |
[INFO] [stdout] 30 |             let mut y = 0.;
[INFO] [stdout]    |                 ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `x` is never read
[INFO] [stdout]   --> src/main.rs:29:17
[INFO] [stdout]    |
[INFO] [stdout] 29 |             let mut x = 0.;
[INFO] [stdout]    |                 ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `y` is never read
[INFO] [stdout]   --> src/main.rs:30:17
[INFO] [stdout]    |
[INFO] [stdout] 30 |             let mut y = 0.;
[INFO] [stdout]    |                 ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 17s
[INFO] running `Command { std: "docker" "inspect" "e59d9f25a61715e831a4b32913588bd1c73308ea46c2b2c3ec6bd9cb314a0b7c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e59d9f25a61715e831a4b32913588bd1c73308ea46c2b2c3ec6bd9cb314a0b7c", kill_on_drop: false }`
[INFO] [stdout] e59d9f25a61715e831a4b32913588bd1c73308ea46c2b2c3ec6bd9cb314a0b7c